In Christianity, there is what I would term the Saint Thomas approach which is the doubting Thomas approach of not believing something without first hand sight. This approach to religion places the onus of proof onto the conveyor of evidence. Unless, the messenger can actually show real visible proof, the message is not accepted as believable. We tend not to believe that human use of food from other countries might damage the world ecosystem.
Some times, the approach will not work because of the basic flaw in it's logic:
http://www.washingtonpost.com/wp-dyn/content/article/2010/10/26/AR2010102607146.html?tid=wp_featuredstories
Will ye no think kindly on those who would be your friends! May the sun shine with your thoughts, today, and happiness grow in your heart! May you allow yourself some peace of mind.